Diamond-tool.



J. S. ROSE. DIAMOND TOOL.

APPLICATION FILED JULY 31', 1914.

1,122,539, Patented De0.29,1914. f

WITNESS S llVVE/VTOI? -W- QWMM ATTORNEY JOSEPH S. ROSE, F PORT CHESTER, NEW YORK.

DIAMOND-TOOL.

Specification of Letters Patent. Patented Dec, 29, 1914.

Application filed J uly 31, 1914. Serial No. 854,246.

' village of Port Chester, Westchester county,

and State of New York, have invented a new and useful Improvement in Diamond- Tools, of which the following is a specification.

The object of the invention is to provide a diamond tool wherein the diamond is removably and adjustably mountedand to render the tool adaptable to stones of various sizes. To this end a shell is provided having a collar defining a variable orifice in which the stone is held by a clamping member formed toengage with the stone within the collar.

Certain preferred embodiments of the invention will now be described with reference to the accompanying drawings, wherein:

Figure 1 is a side elevation of one of the devices; Fig. 2 is a front View thereof; Fig. 3 is a longitudinal section; Fig. 4 is a perspective view of the removable collar; Fig. 5 is a longitudinal section through a slightly modified form; and Fig. 6 is a view partly in section and partly in sideelevation of another embodiment of the tool. Fig. 7 is a perspective view of the tapered collar showing a slot in its outer periphery.

In Figs. 1 to 4, 1 is a shell having a threaded bore 2, terminating in front in a. tapered bore 3. A removable tapered collar 4 occupies the tapered bore and preferably comprises one of a series adapted to define an orifice of variable size. An internal clamping member 5 has a cylindrical threaded portion 6 to engage the threaded bore and a tapered extremity 7 adapted to enter the collar 4, there to hold the diamond 8 partially projecting from the orifice, as shown in Figs. 1 and 3. The said member in this form is shown as provided with a rearwardly projecting shank 9 having a kerf 10, by'which. it may be screwed into the shell. A conical recess 12 formed in the forward end of the clamping member coiiperates withthe collar to form an adjustable cavity for the reception of the diamond and insures a firm holding irrespective of the particular form of the stone. As the latter becomes worn it can be taken out and shifted to a different position, or the orifice can be reduced in size by inserting a smaller collar, or the stone may be replaced by another, with an appropriate selection of collar.

The form of Fig. 5 is substantially like the preceding except that the. shell 1 is somewhat longer, and the clamping'member 5" is not provided with a rearwardly pro I ecting shank.

Both of the foregoing constructions are machine tools.- Fig. 6 shows a hand tool, wherein the clamping member 5 is formed on or secured to a suitable handle 11, the construction being otherwise like Figs. 1 to 3.

Another featureof my invention is to make the tapered collar 4 with a slot in its outer periphery, as illustrated in Fig. 7. This form of collar would enable the tool to be used for polishing diamonds.

What is claimed as new is:

. 1. In a diamond tool, the combination of a tapered shell, a tapered collar defining an orifice in the front end of said shell, a clamping member having a tapered end adapted to hold a diamond in said collar, and screw means for causing the member and shell to grip the diamond.

2. In a diamond tool, the combination of a shell having a tapered bore at the forward end of its cavity, a tapered collar adaptedto occupy said tapered bore, and a clamping member having screw means for forcing itagainst a diamond in said collar.

3. In a diamond tool, the combination of a shell, a. loose tapered slotted collar therein, and an internal clamping member havmg a conical recess in front to hold 21. dia-- mond inconjunction with said collar. 4. In a diamond tool, the combination of a shell, aloose tapered collar therein, and

an internal clamping member having a conic'al recess in front to hold a diamond in conjunction with said collar.

5. In a diamond tool, the combination of a shell having a threaded bore terminating in front in a tapered bore, a tapered collar occupying said tapered bore, and a screw engaging said threaded bore and having a tapered extremity provided with a conical recess'to enter said collar and form therea cavity in'which the stone is rigidly e Y Dated, June 30th, 1914.

JOSEPH S. ROSE. In presence of-- CLARENCE G. GALSTON, G. H. EMPEY. 

